tools/testing/selftests/net/forwarding/router_broadcast.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 ALL_TESTS="ping_ipv4"
   5 NUM_NETIFS=6
   6 source lib.sh
   7
   8 h1_create()
   9 {
  10         vrf_create "vrf-h1"
  11         ip link set dev $h1 master vrf-h1
  12
  13         ip link set dev vrf-h1 up
  14         ip link set dev $h1 up
  15
  16         ip address add 192.0.2.2/24 dev $h1
  17
  18         ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
  19         ip route add 198.51.200.0/24 vrf vrf-h1 nexthop via 192.0.2.1
  20 }
  21
  22 h1_destroy()
  23 {
  24         ip route del 198.51.200.0/24 vrf vrf-h1
  25         ip route del 198.51.100.0/24 vrf vrf-h1
  26
  27         ip address del 192.0.2.2/24 dev $h1
  28
  29         ip link set dev $h1 down
  30         vrf_destroy "vrf-h1"
  31 }
  32
  33 h2_create()
  34 {
  35         vrf_create "vrf-h2"
  36         ip link set dev $h2 master vrf-h2
  37
  38         ip link set dev vrf-h2 up
  39         ip link set dev $h2 up
  40
  41         ip address add 198.51.100.2/24 dev $h2
  42
  43         ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
  44         ip route add 198.51.200.0/24 vrf vrf-h2 nexthop via 198.51.100.1
  45 }
  46
  47 h2_destroy()
  48 {
  49         ip route del 198.51.200.0/24 vrf vrf-h2
  50         ip route del 192.0.2.0/24 vrf vrf-h2
  51
  52         ip address del 198.51.100.2/24 dev $h2
  53
  54         ip link set dev $h2 down
  55         vrf_destroy "vrf-h2"
  56 }
  57
  58 h3_create()
  59 {
  60         vrf_create "vrf-h3"
  61         ip link set dev $h3 master vrf-h3
  62
  63         ip link set dev vrf-h3 up
  64         ip link set dev $h3 up
  65
  66         ip address add 198.51.200.2/24 dev $h3
  67
  68         ip route add 192.0.2.0/24 vrf vrf-h3 nexthop via 198.51.200.1
  69         ip route add 198.51.100.0/24 vrf vrf-h3 nexthop via 198.51.200.1
  70 }
  71
  72 h3_destroy()
  73 {
  74         ip route del 198.51.100.0/24 vrf vrf-h3
  75         ip route del 192.0.2.0/24 vrf vrf-h3
  76
  77         ip address del 198.51.200.2/24 dev $h3
  78
  79         ip link set dev $h3 down
  80         vrf_destroy "vrf-h3"
  81 }
  82
  83 router_create()
  84 {
  85         ip link set dev $rp1 up
  86         ip link set dev $rp2 up
  87         ip link set dev $rp3 up
  88
  89         ip address add 192.0.2.1/24 dev $rp1
  90
  91         ip address add 198.51.100.1/24 dev $rp2
  92         ip address add 198.51.200.1/24 dev $rp3
  93 }
  94
  95 router_destroy()
  96 {
  97         ip address del 198.51.200.1/24 dev $rp3
  98         ip address del 198.51.100.1/24 dev $rp2
  99
 100         ip address del 192.0.2.1/24 dev $rp1
 101
 102         ip link set dev $rp3 down
 103         ip link set dev $rp2 down
 104         ip link set dev $rp1 down
 105 }
 106
 107 setup_prepare()
 108 {
 109         h1=${NETIFS[p1]}
 110         rp1=${NETIFS[p2]}
 111
 112         rp2=${NETIFS[p3]}
 113         h2=${NETIFS[p4]}
 114
 115         rp3=${NETIFS[p5]}
 116         h3=${NETIFS[p6]}
 117
 118         vrf_prepare
 119
 120         h1_create
 121         h2_create
 122         h3_create
 123
 124         router_create
 125
 126         forwarding_enable
 127 }
 128
 129 cleanup()
 130 {
 131         pre_cleanup
 132
 133         forwarding_restore
 134
 135         router_destroy
 136
 137         h3_destroy
 138         h2_destroy
 139         h1_destroy
 140
 141         vrf_cleanup
 142 }
 143
 144 bc_forwarding_disable()
 145 {
 146         sysctl_set net.ipv4.conf.all.bc_forwarding 0
 147         sysctl_set net.ipv4.conf.$rp1.bc_forwarding 0
 148         sysctl_set net.ipv4.conf.$rp2.bc_forwarding 0
 149 }
 150
 151 bc_forwarding_enable()
 152 {
 153         sysctl_set net.ipv4.conf.all.bc_forwarding 1
 154         sysctl_set net.ipv4.conf.$rp1.bc_forwarding 1
 155         sysctl_set net.ipv4.conf.$rp2.bc_forwarding 1
 156 }
 157
 158 bc_forwarding_restore()
 159 {
 160         sysctl_restore net.ipv4.conf.$rp2.bc_forwarding
 161         sysctl_restore net.ipv4.conf.$rp1.bc_forwarding
 162         sysctl_restore net.ipv4.conf.all.bc_forwarding
 163 }
 164
 165 ping_test_from()
 166 {
 167         local oif=$1
 168         local dip=$2
 169         local from=$3
 170         local fail=${4:-0}
 171
 172         RET=0
 173
 174         log_info "ping $dip, expected reply from $from"
 175         ip vrf exec $(master_name_get $oif) \
 176                 $PING -I $oif $dip -c 10 -i 0.1 -w $PING_TIMEOUT -b 2>&1 \
 177                 | grep "bytes from $from" > /dev/null
 178         check_err_fail $fail $?
 179 }
 180
 181 ping_ipv4()
 182 {
 183         sysctl_set net.ipv4.icmp_echo_ignore_broadcasts 0
 184
 185         bc_forwarding_disable
 186         log_info "bc_forwarding disabled on r1 =>"
 187         ping_test_from $h1 198.51.100.255 192.0.2.1
 188         log_test "h1 -> net2: reply from r1 (not forwarding)"
 189         ping_test_from $h1 198.51.200.255 192.0.2.1
 190         log_test "h1 -> net3: reply from r1 (not forwarding)"
 191         ping_test_from $h1 192.0.2.255 192.0.2.1
 192         log_test "h1 -> net1: reply from r1 (not dropping)"
 193         ping_test_from $h1 255.255.255.255 192.0.2.1
 194         log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)"
 195
 196         ping_test_from $h2 192.0.2.255 198.51.100.1
 197         log_test "h2 -> net1: reply from r1 (not forwarding)"
 198         ping_test_from $h2 198.51.200.255 198.51.100.1
 199         log_test "h2 -> net3: reply from r1 (not forwarding)"
 200         ping_test_from $h2 198.51.100.255 198.51.100.1
 201         log_test "h2 -> net2: reply from r1 (not dropping)"
 202         ping_test_from $h2 255.255.255.255 198.51.100.1
 203         log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)"
 204         bc_forwarding_restore
 205
 206         bc_forwarding_enable
 207         log_info "bc_forwarding enabled on r1 =>"
 208         ping_test_from $h1 198.51.100.255 198.51.100.2
 209         log_test "h1 -> net2: reply from h2 (forwarding)"
 210         ping_test_from $h1 198.51.200.255 198.51.200.2
 211         log_test "h1 -> net3: reply from h3 (forwarding)"
 212         ping_test_from $h1 192.0.2.255 192.0.2.1 1
 213         log_test "h1 -> net1: no reply (dropping)"
 214         ping_test_from $h1 255.255.255.255 192.0.2.1
 215         log_test "h1 -> 255.255.255.255: reply from r1 (not forwarding)"
 216
 217         ping_test_from $h2 192.0.2.255 192.0.2.2
 218         log_test "h2 -> net1: reply from h1 (forwarding)"
 219         ping_test_from $h2 198.51.200.255 198.51.200.2
 220         log_test "h2 -> net3: reply from h3 (forwarding)"
 221         ping_test_from $h2 198.51.100.255 198.51.100.1 1
 222         log_test "h2 -> net2: no reply (dropping)"
 223         ping_test_from $h2 255.255.255.255 198.51.100.1
 224         log_test "h2 -> 255.255.255.255: reply from r1 (not forwarding)"
 225         bc_forwarding_restore
 226
 227         sysctl_restore net.ipv4.icmp_echo_ignore_broadcasts
 228 }
 229
 230 trap cleanup EXIT
 231
 232 setup_prepare
 233 setup_wait
 234
 235 tests_run
 236
 237 exit $EXIT_STATUS